A GDA ortwewl a Glucose Disposal Agent helps the body process glucose in the bloodstream. It does this by helping the body store glucose in muscle tissue where it can do its job at the time, or store it as glycogen in the muscles and liver, where it can later be converted into energy.
Per serving of 5 caps:
2000mg cinnamon bark extract
1000mg berbarin HCL
500mg bitter melon extract
500mg patented 20-1 water soluble Cinnulin Pf
300mg ALA
250mcg Chromium Picolinate
You can see studies of the ingredients in the links below.
Berberine
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2410097/
ALA
https://www.ncbi.nlm.nih.gov/pubmed/21666939
Cinnamon
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2901047/
(Cinnulin)
http://www.cinnulin.com/more_info.html
Bitter Melon